The skin on our face is made up of 70 per cent water. 25 per cent of this water is present in the epidermis, on the surface of the skin. Good circulation gives good hydration over the whole face and enhances nutrient exchange between cells. Water also keeps the skin supple and gives it its ‘fleshy' look. Disruption of the balance of this skin barrier causes water to evaporate. The causes of this imbalance are varied: pollution, air-conditioning, sun, tobacco, hormones, stress, fatigue... Loss of water can also be caused by using unsuitable cosmetics. A make-up remover which is too harsh or abrasive will dry up the area around the eye. Remember: day cream should only be applied up to the top of the cheekbones. Instead, apply a specially formulated product to the area around the eye. Because of a lack of moisture, the skin around the eye creases up, so it looks as if there are lots of little wrinkles; these are the famous fine lines.